Hotshotz 5x9 Reusable Heating Pad for Back Pain Relief - Microwaveable Heat Pack for Muscle Soreness, Cramps & Joint Pain - Perfect for Home, Office & Travel Use

This is our all around most versatile heat pack. It is large enough to use on your lower back, neck, arms and legs. It is also convenient enough to carry with you anywhere to keep warm on a cold day. The 5×9 lasts about and 1½ hours depending on how well you insulate it.